Just got some new folks that moved in next door. Seems like he's going to be the mister know it all type, but I'll give him a second chance. Anyhow, wanting to take a quick run to the store, upon returning to the house, the guy catches me in the garage and says It seems to be running rich. It was his first time seeing the cobra. Now Ive had my car for awhile and this is not the usual response I get. So I tell him that my car does what it feels like at the time, because it is EFI. He recommened a tuneup in a can that they sell at azone. Im only three years experience with EFI. Now the question. Is it possible to be running rich with an EFI. Three notes. I have a 347, and I have film while running at the drag strip that shows a very small noticible puff of smoke at shift points, and last when I let off of the gas while in gear the car does pop like a harley bike, but not an out of tune pop. Any help is apreciated. Running at 14 degrees. I use nos now and again.